Handling Mongoose validation errors – where and how?

Question

I\'m trying to decide how I want to handle validation errors in Mongoose.

Custom error messages using node-validator

I have defined my own validation rules

Answer 1

See the hmv package, which helps you customize the mongoose error message templates, including unique index errors :

template : {PATH_NAME} must be at least {MIN_LENGTH} characters long
schema   : { fullname : { type : String, min : 3, $name : 'Full name' } }
message  : Full name must be at least 3 characters long

template : {PATH_NAME} {VALUE} have been used, please choose another
schema   : { username : { type : String, unique : true } }
message  : username MrBean have been used, please choose another

And specifically supports localization, ex in Vietnamese :

template : {PATH_NAME} dài ít nhất {MIN_LENGTH} kí tự
schema   : { fullname : { type : String, min : 3, $name : 'tên tài khoản' } }
message  : Tên tài khoản dài ít nhất 5 kí tự

Good point is that you only need to customize the message template once, instead of customizing every field of every schema in the previous approach.